I would appreciate any donations. Wishlist or send e-mail type donations to maekawa AT daemon-systems.org.

Thank you.

DBSYM(8)                    System Manager's Manual                   DBSYM(8)

     dbsym -- copy kernel symbol table into db_symtab space

     dbsym [-pv] [-b bfdname] kernel

     dbsym is used to copy the symbol table in a newly linked kernel into the
     db_symtab array (in the data section) so that the ddb(4) kernel debugger
     can find the symbols.  This program is only used on systems for which the
     boot program does not load the symbol table into memory with the kernel.
     The space for these symbols is reserved in the data segment using a
     config option like:
           options        SYMTAB_SPACE=72000
     The size of the db_symtab array (the value of SYMTAB_SPACE) must be at
     least as large as the kernel symbol table.  If insufficient space is
     reserved, dbsym will refuse to copy the symbol table.

     To recognize kernel executable format, the -b flag specifies BFD name of

     If the -p flag is given, dbsym will report the size of the kernel symbol
     table and the size of the db_symtab space.  Two values are printed out in
     a line separated by a space.

     If the -v flag is given, dbsym will print out status information as it is
     copying the symbol table.

     Note that debugging symbols are not useful to the ddb(4) kernel debugger,
     so to minimize the size of the kernel, one should either compile the
     kernel without debugging symbols (no -g flag) or use the strip(1) command
     to strip debugging symbols from the kernel before dbsym is used to copy
     the symbol table.  The command
           strip -d netbsd
     will strip out debugging symbols.

     strip(1), ddb(4)

NetBSD 7.1.2                    March 19, 2012                    NetBSD 7.1.2